Asbestos crown-type packing



1927' E. a. SWITZER ASBESTOS CROWN TYPE PACKING Filed Jan. 26. 1926INVEIYTOR E/mer 'E SW A TTORNEYS.

and peculiarly Patented Apr. 26, 1927.

' ZEIJMER;E;-:SWITZER, OF BEAUMONT, TEXAS.

AsBEs'ros CROWN-.EDYPE :rnonme.

Application pending United States application "Ser. No.

54,243, metallic packing.

NVith. the vforegoing.and other ob ects 1n view,my invention comprisescertain novel constructions, combinations, and arrangemeans of parts aswill be hereinafter fully described, illustrated in the accompanyingdrawings, and more particularly pointed out in the appended claims.

In the drawings:

Figure 1 is a perspective view of a packing constructed in accordancewlth the present invention.

Figure 2 is a sectional view taken on l ne 22, Figure 1, and looking inthe direction of the arrows.

Figure 3 is a sectional view taken on l ne 3- 3, Figure 2, and lookingin the direction of the arrows.-

Figure 4 is a transverse sectional view of the'preferred form or type ofmy asbestos packing. v I

Referring to the drawings by numerals, 1 comprises the broad tightlycompressed asbestos body with a wide fiat outer face 2, and embedded inthe body are metallic seg-' ments 3; these curved segments 3const1tute apair of contacting rings in the body.

In the embodiment shown in Figure 4, beads 4 are formed upon the inneredge of each curved segment 3. The ends 5 of the segments are bevelled(Fig. 3), producing an efficient V-shaped pocket between the contiguousends of the segments, into which, while forming the packing, theasbestos is forced, thereby forming a key 6 of asbestos between theends; in other words, the asbestos body enters between the ends of thesegments, as wellas enclosing the sides and inner edges of the segments,metallic rings, constituted by the segments 3 are formed as asubstantial part of the entire packing. The segments, by reason ofhaving the body with integral keying portions 6 between the ends, cannot work loose, and, therefore, produces a very eflici-ent pack- U10.

Further, the beads 4 also assist in holdbody, and, therefore, I have.

whereby the filed January 26, 1926. semi No. 23,910.

but notas are parts 6 of the 7 produced valuable improvement in thisparticular in asbestos-bodypackings.'

ing the segments in place, ciently as the mt-egral'key Upon referring tothe 'drawingfit will be .noted that the asbestos has at lea'st;oneeighth inch bearing on the rods on either side Ofthe'metallicringsftoform agseal. This structure is necessaryWvhere oil i's in- "yolvedatratemperature of 930 degreesrand 500lbs:pressure. i

It is to be readily understood that by-sliding onesegment 8 by anothersegment, the laps form a perfect ring. If my rings should be made in onepiece, with a ship lap to make the joint, this would increase the costof manufacture by three times more than the construction of my inventionas shown in the official drawings and hereinbefore specificallydescribed. It is also to be noted that in my design of the rings, whenthe packing is tightened, the metallic rings will follow the wear wherethe rings must close in as they wear. However, if the rings were solid,they would be stiffer.

Referring particularly to Figure 4: Doubtlessmany hardly realize what930 degrees of heat and 500 lbs. of pressure means. It is a common factthat stills are at 500 lbs. now more than they are at 280 lbs. All

solid metallic packings need a heavy oil as a seal. Now, after oilpasses six or: seven hundred degrees of heat, the lubricating propertiesare gone, and the oil is becoming gasoline at 950 degrees temperature.All mechanical devices with springs and the like for a take-up will notstand the heat, and, consequently, I use my type of an asbestos packingto stand the heat. Now, in Figure 4, the asbestos is drawn so tight inthis instance to keep the hot oil from penetrating the asbestos; in thestructure shown in igure 2, the rings will be pressed on the rod toohard, whereas in Figure 4 which shows the bead on segments 3, thisstructure acts as a counterbalance, so to speak.

By my structure of a packing as herein described, it can be used inhandling hot oil at 930 degrees of heat and 280 lbs. pressure.

While I have described the preferred embodiments of my invention andillustrated the same in the accompanyingdrawings, certain minor changesor alterations may appear to one skilled in the art to which thisinvention relates, during the extensive manu- I facture of the same,

' rings embedded in the right to make such changes or alterations asshall fairly fall within the scopeof the appended claims.

What I claim is 1. In a device of the class described, thecombination'of a circular asbestos body, said body and having theirinner faces contacting throughout their length, each ring comprisingsegments curved throughout their length, and portions of said asbestosbody between the contiguous ends of the segments in each ring.

2. In a device of the class described, the combination of a circularasbestosbody, a pair of rings embedded in said body and having flat,parallel inner faces contacting their entire length and height, eachring comprising segments curved throughout 2 their length, the segmentsin one ring having and I, therefore, reserve tiguous ends of thesegments in the broadest portion of their ends oppositeto solidportionsin' the in said body, each ring comprisingsegm'ents curved throughouttheir length, ment provided with bevelled ends, the coneach pairdescribed, the; combination of a circular asbestos body, a pair ofparallel contacting rings embedded each segof rings producing V-shapedpockets with each pocket near the outer face of said asbestos body, andportions of said asbestos body filling said V-shapcd pockets. v

'In testimony whereof I hereunto aflix my signature.

ELMER'VE, 'sWITz n. I

